3
ELECTRICAL CONNECTIONS
20
MS15 - MS40 SERIES
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06/2020 - 4007717401 - AD ATEX MS15-MS40 R01 en
3.6 Ex i version of the limit switches
3.6.1 How to connect the electrical cables
Refer to the handbook for data about the device terminals.
Obey the instructions that follow:
•
Electrical wires must agree with applicable standards (e.g. EN 60079-14).
•
Use the electrical connection procedure in the handbook.
•
Put the electrical wires in position and safely attach them to prevent damage. The electrical
wires must also be a sufficient distance from hot surfaces.
•
Make sure that unused electrical wires are safely connected to the ground potential of the
hazardous area. If this is not possible, make sure that each of the unused electrical wires are
safely isolated (other electrical wires, ground etc.) and rated for a test voltage
≥
500 V rms.
•
If it is necessary, make sure the electrical wire insulation gives good protection from
corrosion.
•
Connect only to separate certified, intrinsically-safe circuits. Make sure that the electrical
circuit characteristics are not more than the values that follow.
•
Do not remove more than 6 mm / 0.2
¨
of insulation from the wire.
3.6.2 Maximum intrinsically-safe values for the electrical circuit
DANGER!
Make sure that the power supply is intrinsically safe.
Version
Cable
option
Intrinsically-safe values for the electrical circuit
U
i
ac/dc
U
i
dc
I
i
P
i
C
i
L
i
[V]
[A]
[W] /
[VA]
[W]
[nF]
[
µ
H]
MS15
MS40
Without
250
—
1
60
—
0
0
With
250
—
1
60
—
1
6
MS15 NAMUR
MS40 NAMUR
Without
—
24
0.1
—
0.21
0
0
With
—
24
0.1
—
0.21
1
6
